# 技术方案 - AI回复来源标识

> **版本**: v1.0
> **日期**: 2026-07-20
> **状态**: [待评审]
> **作者**: 许清楚
> **REQ编号**: REQ-AI-004
> **关联PRD**: `01-产品文档/03-AI服务/PRD-REQ-AI-004-AI回复来源标识-v1.0.md`

---

## 一、方案概述

本技术方案实现 AI 回复来源标识功能，在 AI 回复消息上显示来源图标（图谱/Dify/本地路由等），提升来源透明度和可追溯性。

---

## 二、数据库设计

### 2.1 消息表新增字段

```sql
-- 消息表新增字段
ALTER TABLE messages ADD COLUMN reply_source VARCHAR(50) DEFAULT NULL;
-- 存储格式：JSON数组，如 '["graph"]' 或 '["routing","assets"]'
```

### 2.2 字段说明

| 字段 | 类型 | 说明 |
|------|------|------|
| reply_source | VARCHAR(50) | 来源标识，JSON数组格式 |

---

## 三、后端实现

### 3.1 来源标识配置

```python
# 来源标识配置
REPLY_SOURCE_MARKERS = {
    "byod": "🔒",       # BYOD拦截
    "rule": "⚡️",      # 本地快判（打招呼/呼叫人工）
    "vision": "🖼️",     # 图片增强
    "graph": "🕸️",      # Neo4j图谱
    "dify": "🤖",       # Dify主推理
    "routing": "📋",     # 业务路由
    "assets": "💻",      # 资产推荐
    "fallback": "⚠️",    # 降级回复
}

# 来源优先级
REPLY_SOURCE_PRIORITY = [
    "rule", "byod", "vision", "graph", "dify", "routing", "assets", "fallback"
]
```

### 3.2 来源标识追加函数

```python
from collections import OrderedDict
from typing import List

def append_source_marker(content: str, sources: List[str]) -> str:
    """在回复内容末尾追加来源标识"""
    # 获取对应图标
    markers = [REPLY_SOURCE_MARKERS.get(s, "") for s in sources if s in REPLY_SOURCE_MARKERS]

    # 按优先级排序并去重
    seen = set()
    unique_markers = []
    for marker in markers:
        if marker and marker not in seen:
            seen.add(marker)
            unique_markers.append(marker)

    if unique_markers:
        return content + " " + "".join(unique_markers)
    return content
```

### 3.3 各路由返回格式

```python
# 各路由返回时携带来源标识
def handle_local_rule(...) -> dict:
    return {
        "content": "回复内容",
        "reply_source": ["rule"]  # 来源列表
    }

def handle_byod(...) -> dict:
    return {
        "content": "回复内容",
        "reply_source": ["byod"]
    }

def handle_vision(...) -> dict:
    return {
        "content": "回复内容",
        "reply_source": ["vision"]
    }

def handle_graph(...) -> dict:
    return {
        "content": "回复内容",
        "reply_source": ["graph"]
    }

def handle_dify(...) -> dict:
    return {
        "content": "回复内容",
        "reply_source": ["dify"]
    }

def handle_routing(...) -> dict:
    return {
        "content": "回复内容",
        "reply_source": ["routing"]
    }

def handle_assets(...) -> dict:
    return {
        "content": "回复内容",
        "reply_source": ["assets"]
    }

def handle_fallback(...) -> dict:
    return {
        "content": "回复内容",
        "reply_source": ["fallback"]
    }
```

### 3.4 Persist层统一处理

```python
def persist_message(conversation_id: str, content: str, reply_source: List[str], ...):
    """持久化消息，统一处理来源标识"""

    # 追加来源标识到显示内容
    display_content = append_source_marker(content, reply_source)

    # 保存到数据库（原始content + reply_source字段）
    message = Message(
        conversation_id=conversation_id,
        content=content,  # 原始内容
        reply_source=json.dumps(reply_source),  # 来源列表
        created_at=datetime.now()
    )
    db.save(message)

    # WebSocket推送（带标识的内容）
    ws_push(conversation_id, {
        "type": "ai_reply",
        "content": display_content,  # 带标识
        "reply_source": reply_source
    })
```

---

## 四、配置文件

```yaml
# config/ai_reply.yaml
reply_source:
  markers:
    byod: "🔒"
    rule: "⚡️"
    vision: "🖼️"
    graph: "🕸️"
    dify: "🤖"
    routing: "📋"
    assets: "💻"
    fallback: "⚠️"
  priority:
    - rule
    - byod
    - vision
    - graph
    - dify
    - routing
    - assets
    - fallback
  max_display: 3  # 最多显示3个标识
```

---

## 五、前端实现

### 5.1 常量定义

```javascript
// 来源标识映射
const SOURCE_MARKERS = {
  byod: "🔒",
  rule: "⚡️",
  vision: "🖼️",
  graph: "🕸️",
  dify: "🤖",
  routing: "📋",
  assets: "💻",
  fallback: "⚠️"
};

// 来源标签（坐席端详细展示）
const SOURCE_LABELS = {
  byod: "BYOD拦截",
  rule: "本地快判",
  vision: "图片增强",
  graph: "Neo4j图谱",
  dify: "Dify推理",
  routing: "业务路由",
  assets: "资产推荐",
  fallback: "降级回复"
};
```

### 5.2 H5员工端 - 消息气泡组件

```javascript
// src/components/MessageBubble.vue
<template>
  <div class="ai-bubble">
    <div class="content">{{ content }}</div>
    <div v-if="markers" class="markers">{{ markers }}</div>
  </div>
</template>

<script>
export default {
  props: {
    content: String,
    replySource: Array
  },
  computed: {
    markers() {
      if (!this.replySource || !this.replySource.length) return '';
      return this.replySource
        .map(s => SOURCE_MARKERS[s])
        .join('');
    }
  }
}
</script>

<style scoped>
.markers {
  margin-top: 4px;
  font-size: 14px;
}
</style>
```

### 5.3 坐席工作台 - 来源详情展示

```javascript
// src/components/SourceDetail.vue
<template>
  <div class="source-detail">
    <span class="label">来源：</span>
    <span class="value">{{ sourceLabels }}</span>
  </div>
</template>

<script>
export default {
  props: {
    sources: Array
  },
  computed: {
    sourceLabels() {
      if (!this.sources || !this.sources.length) return '';
      return this.sources
        .map(s => SOURCE_LABELS[s])
        .join(' + ');
    }
  }
}
</script>
```

---

## 六、接口设计

### 6.1 消息查询接口（扩展）

```json
// GET /api/messages/{conversation_id}
{
  "messages": [
    {
      "id": "msg_001",
      "content": "重置密码有以下方式...",
      "reply_source": ["graph"],
      "sender_type": "ai",
      "created_at": "2026-07-20T10:00:00Z"
    }
  ]
}
```

### 6.2 WebSocket推送（扩展）

```json
{
  "type": "ai_reply",
  "content": "重置密码有以下方式... 🕸️",
  "reply_source": ["graph"],
  "message_id": "msg_001"
}
```

---

## 七、测试用例

| 用例 | 输入 | 预期输出 |
|------|------|----------|
| TC1 | reply_source=["graph"] | 显示 "🕸️" |
| TC2 | reply_source=["routing","assets"] | 显示 "📋💻" |
| TC3 | reply_source=[] | 不显示标识 |
| TC4 | reply_source长度>3 | 按优先级取前3个 |

---

## 八、部署与配置

### 8.1 配置热更新

标识配置支持热更新，无需重启服务：

```python
# 配置热加载
def reload_config():
    global REPLY_SOURCE_MARKERS, REPLY_SOURCE_PRIORITY
    config = load_yaml("config/ai_reply.yaml")
    REPLY_SOURCE_MARKERS = config['reply_source']['markers']
    REPLY_SOURCE_PRIORITY = config['reply_source']['priority']
```

### 8.2 数据库迁移

```bash
# 执行迁移
alembic upgrade head

# 或手动执行
ALTER TABLE messages ADD COLUMN reply_source VARCHAR(50) DEFAULT NULL;
```

---

## 九、关联文档

| 文档 | 说明 |
|------|------|
| `PRD-REQ-AI-004-AI回复来源标识-v1.0.md` | 产品需求文档 |
| `原型-REQ-AI-004-AI回复来源标识-v1.0.html` | 交互原型 |